This page is general health information, not medical advice. It cannot tell you whether you have an infection. A clinician can, and the testing options on this site are a good place to start.

Knowing what happens at a visit makes it much easier to book one. This guide walks through an STD test from the front desk to the results, so nothing in the room is a surprise.

Most visits are short and routine. Clinicians in Chicago do this every day, and a test is a normal part of looking after your health.

Quick answer: what does an STD test involve?

A visit usually has four parts. You answer some health questions, give the samples your clinician recommends, wait for lab work, and then get your results with a plan for any next steps.

The samples are often a urine sample, one or more swabs, and a blood draw. Which ones you give depends on your history, your symptoms and the body sites that may have been exposed. Your clinician decides that with you.

What you need before you go

You do not need to prepare much. This short list covers most of it:

Photo ID or any ID the clinic asks for. Ask when you call if you are unsure what is accepted.
Your insurance card, if you have one. The Chicago Department of Public Health (CDPH) says care at its sexual health clinics is provided regardless of ability to pay or insurance status, and asks insured patients to bring a card.
A list of current medicines and allergies. A phone note works.
Dates and details you remember. Approximate dates of recent partners, past tests and any symptoms help your clinician choose the right tests.
A way to be reached. Most clinics ask for a phone number so they can share results.
A little time. Walk-in clinics are first come, first served, so waits vary.

It helps to avoid urinating for about an hour before a urine test if you can, because the sample can work better that way. If a clinic gives different instructions, follow the clinic.

Step 1: Choose a clinic and decide how to go

Chicago has several options, and they work differently. Some take walk-ins and some need an appointment.

Howard Brown Health runs a sexual health walk-in clinic with "no appointment necessary" and first come, first served visits. Sites include 4025 N. Sheridan Rd., 641 W. 63rd St. and the Broadway Youth Center at 1023 W. Irving Park Road. The phone number for all three is 773.388.1600. Howard Brown describes the service as low-cost and offers a Sliding Fee Discount Program based on income and family size.
Ruth M. Rothstein CORE Center (Cook County Health) at 2020 W. Harrison St. has a walk-in STI Screening Clinic. Cook County Health says to call Monday to Friday, 8:30 am to 3:30 pm, at 312-572-4700, and that same-day HIV and STI services are provided. CDC GetTested lists a sliding scale for this site.
CDPH Sexual Health Specialty Clinics are in Lakeview (2849 N. Clark St., 312.744.5507), Austin (4909 W. Division St., Suite 411, 312.746.4871) and Roseland (200 E. 115th St., 312.747.1090). CDPH's page says to call for an appointment, that limited walk-ins are available, and that the clinics close from 12 to 1 pm daily and on City holidays. Hours differ by site, so call to confirm before you go.
Planned Parenthood of Illinois, Rogers Park Health Center at 5725 N Broadway, (773) 942-7193. CDC GetTested says an appointment is required and that insurance and Medicaid are accepted.

Hours and services can change. Always check with the clinic or the health department before you travel. For a fuller local list, see STD testing in Chicago: where to get tested and what it costs.

You can also use the CDC's locator at gettested.cdc.gov to find more sites.

For languages and interpreter help, the facts we have do not list which languages each clinic offers. Ask when you call, and ask for an interpreter if you want one.

Step 2: Check in and answer the intake questions

You will fill out a form or talk with a nurse or clinician. The questions can feel personal, but each one has a practical purpose. Here is what is usually asked and why.

Why are you here today? This tells the clinician whether you have symptoms, had a possible exposure, or want a routine check.
Do you have any symptoms? Discharge, pain when urinating, sores, rashes, itching, pelvic pain or testicular pain can point toward certain tests. Many infections cause no symptoms at all, so a visit makes sense without any.
What kinds of sex have you had? Oral, vaginal and anal sex expose different body sites. The CDC STI Treatment Guidelines (2021) recommend testing the sites that may have been exposed, such as the throat, rectum, or genitals.
How many partners, and what are their genders? This helps match screening to your situation. It is not a judgment. People of every gender and orientation get tested.
Do you use condoms or other barriers? This helps the clinician talk about prevention that fits your life.
Have you been tested before, and when? Past results and dates help avoid repeat tests and show what is due.
Are you pregnant or could you be? Pregnancy changes which tests and treatments are used. Illinois law (410 ILCS 320/1, the Prenatal Syphilis Act) requires syphilis testing at the first prenatal exam and again in the third trimester, between 27 and 32 weeks. The statute exempts a woman who objects on religious grounds.
Are you taking PrEP or doxy-PEP, or interested in either? These are medicines a clinician prescribes to lower the chance of HIV or some bacterial STIs. The CDC issued doxy-PEP guidance in 2024. Whether it fits you is a conversation with a clinician.

You can say "I would rather not answer" to any question. Your clinician can still help, though fewer details may mean a less targeted test.

If you are 12 to 17: Illinois law (410 ILCS 210/4, the Consent by Minors to Health Care Services Act) says a minor 12 or older who may have come into contact with an STD can consent to care related to prevention, diagnosis or treatment, and parental consent is not necessary. The law also says providers make reasonable efforts to involve the family if they believe it will not be detrimental, and that each STD incident is reported to public health. Howard Brown's Broadway Youth Center is listed as a walk-in location, and its site describes youth services for ages 12 to 24.

Step 3: Give your samples

The exam room part is usually quick. There are three kinds of samples, and you may give one, two or all three.

Urine sample

You urinate into a small cup in a private restroom. Urine is a common sample for chlamydia and gonorrhea in people of any gender, according to the CDC STI Treatment Guidelines (2021).

This is the same for an STD test for men and an STD test for women, though the best sample can differ. For some women, a vaginal swab works well. Your clinician will say which they prefer.

Swabs

A swab is a soft cotton-tipped stick. It is gently rubbed on the area being tested for a few seconds. Depending on your history, swabs may be taken from:

the vagina or cervix
the throat
the rectum
the urethra (the opening where urine leaves the body), or a sore if one is present

Many clinics let you collect a vaginal or rectal swab yourself in private, with instructions. A throat swab is a quick brush at the back of the mouth. You can ask the clinician to explain each step before it happens, and you can pause at any time.

A swab for a sore or blister can help test for herpes. Herpes testing differs from other STI tests, and the CDC does not recommend routine herpes blood screening for people with no symptoms. Your clinician can explain what makes sense for you.

Blood draw

A clinician draws a small amount of blood from a vein in your arm. Blood tests are used for HIV, syphilis, and hepatitis B and C, among others.

Some clinics offer a rapid HIV test that may use a finger prick or oral fluid and can give a result during the visit. Howard Brown, the CORE Center and Planned Parenthood of Illinois Rogers Park list rapid HIV testing.

The CDC recommends that everyone ages 13 to 64 get tested for HIV at least once, and more often for people with ongoing chances of exposure. The CDC also recommends hepatitis C screening for adults at least once. Your clinician can tell you what applies to you.

Step 4: Understand what a full STD panel is and is not

People often ask for a "full STD panel" or "the whole std panel." There is no single fixed list that every clinic uses. What gets called a panel varies by clinic and by person.

A typical panel may include chlamydia, gonorrhea, syphilis and HIV. Some add hepatitis B or C, or trichomoniasis. Your history decides what belongs on the list, not a standard bundle.

Here is what a panel usually does not include:

Routine herpes blood testing. The CDC does not recommend it for people without symptoms, so many panels leave it out unless a clinician sees a reason.
HPV testing for men. The CDC notes that no approved HPV test exists for screening men. For women, HPV is checked as part of cervical cancer screening, which is a different visit and test.
Every infection at every body site. A urine sample alone does not check the throat or rectum.

So the best question is not "what is in the panel?" but "which tests fit my situation, and which body sites should be checked?" Ask your clinician that directly.

STD test for men and STD test for women: what differs

The process is mostly the same. The differences come from anatomy, exposure and age.

Women: The CDC STI Treatment Guidelines (2021) recommend yearly chlamydia and gonorrhea screening for sexually active women under 25, and for older women with risk factors such as a new partner. Pregnancy adds specific testing.
Men: A urine sample often works for chlamydia and gonorrhea. The CDC recommends screening at least yearly for gay, bisexual and other men who have sex with men, at the sites of exposure, with more frequent screening for some.
Transgender and nonbinary people: Testing follows the body parts that may have been exposed, not a person's gender. Tell the clinician about your anatomy and your sex life, and they can choose the right tests.

Step 5: Ask questions before you leave

Before you go, check these points:

Which tests were run, and which were not?
How and when will I get results?
Who calls me, and from what number?
If a result needs follow-up, what happens next?
When should I test again?

Writing the answers down helps, since it is easy to forget details after a visit.

Step 6: Get your results

Timing depends on the test. A rapid HIV test may give a result during the visit. Lab-based tests for chlamydia, gonorrhea, syphilis and others often take a few days. The clinic can tell you its usual timing.

Results may come by phone, a patient portal or in person. Clinics often call about results that need follow-up, so keep your phone number current.

What results can mean

A negative result generally means the test did not find that infection in your sample. It does not rule out an exposure that happened very recently. The CDC describes a "window period," the time after exposure before a test can reliably detect an infection, and it differs by infection and test type. Ask your clinician how it applies to you and whether a repeat test makes sense.

A positive result means the test found signs of that infection. Your clinician will explain what it means and what comes next. Here is what the CDC says about outcomes:

Chlamydia, gonorrhea, syphilis and trichomoniasis are curable with treatment from a clinician.
HIV, herpes and HPV are not curable, but they are treatable or manageable with care from a clinician.

Treatment is whatever your clinician prescribes for you. Do not start medicine you were not prescribed.

In Illinois, health care professionals report cases of HIV, syphilis, gonorrhea, chlamydia and some other infections to public health within seven days of diagnosis or treatment. In Chicago, reports go to the local health department (77 Ill. Adm. Code 693.20 and 693.30). This is routine public health practice.

For partners, Illinois law allows expedited partner therapy for chlamydia, gonorrhea and trichomoniasis, covering partners exposed in the previous 60 days (CDC, Legal Status of EPT in Illinois). Syphilis is not covered. Your clinician can explain what is possible for your partners.

Tips for a smoother visit

Call ahead. CDPH itself says to call the clinic to verify hours, and walk-in availability can change.
Go early in the day if you plan to walk in, since first come, first served clinics can fill up.
Be specific about body sites. Saying which kinds of sex you have had helps the clinician pick the right swabs.
Ask about cost first. CDPH does not state that its visits are free, only that care is provided regardless of ability to pay. Howard Brown and the CORE Center list sliding scale options. Ask about fees when you call.
Bring a partner or friend if that helps you feel at ease.
Ask about prevention. Visits are a good time to ask about vaccines, PrEP, and doxy-PEP. Illinois also has PrEP4Illinois, a state medication assistance program (helpline 1-833-773-7445), and a statewide standing order that lets Illinoisans get PrEP from a trained pharmacist without a prior prescription (IDPH, April 2025).

Common mistakes to avoid

Assuming one test covers everything. Ask which infections and body sites were checked.
Skipping a test because you feel fine. Many infections cause no symptoms, which is why the CDC recommends screening for many groups.
Testing too soon after an exposure and stopping there. Ask about the window period and a repeat test.
Not sharing symptoms or sites of exposure. A clinician cannot test for what they do not know about.
Leaving without knowing how results arrive. Confirm the call or portal process before you go.
Waiting to be "sure" before going. A visit is not a verdict. It is information, and clinics see all kinds of people every day.

Why testing matters in Chicago

In 2022, the Illinois Department of Public Health (IDPH) reported 27,596 chlamydia cases in the City of Chicago, a rate of 1,023.7 per 100,000 people, and 12,382 gonorrhea cases, a rate of 459.3 per 100,000. IDPH calculates these rates using 2010 Census population, and city figures are from 2022, so they are not directly comparable with statewide numbers from other years.

These are reported counts, and they say nothing about any one person. They do show that testing is a common part of health care in the city.

Expected results: what to bring away from your visit

After a visit, you can expect to know which tests were done, when to expect results, and what the clinician suggests next. Results can show whether the test detected an infection in your sample, but no test is perfect and timing matters. Your clinician is the right person to interpret them with you.

If you want more places to try, the CDC's GetTested locator lists free and low-cost sites. The CDPH sexual health services page lists the city's clinics. You can also call the Illinois HIV/STD Hotline at 1-800-243-2437 with questions.

What Happens at an STD Test: A Step-by-Step Guide for Chicago